'\" t
.\" $Id: cdk_alphalist.3,v 1.27 2014/01/19 02:10:24 tom Exp $"
.de XX
..
.TH cdk_alphalist 3
.SH NAME
.XX activateCDKAlphalist
.XX destroyCDKAlphalist
.XX drawCDKAlphalist
.XX eraseCDKAlphalist
.XX getCDKAlphalistBox
.XX getCDKAlphalistContents
.XX getCDKAlphalistCurrentItem
.XX getCDKAlphalistFillerChar
.XX getCDKAlphalistHighlight
.XX injectCDKAlphalist
.XX moveCDKAlphalist
.XX newCDKAlphalist
.XX positionCDKAlphalist
.XX setCDKAlphalist
.XX setCDKAlphalistBackgroundAttrib
.XX setCDKAlphalistBackgroundColor
.XX setCDKAlphalistBox
.XX setCDKAlphalistBoxAttribute
.XX setCDKAlphalistContents
.XX setCDKAlphalistCurrentItem
.XX setCDKAlphalistFillerChar
.XX setCDKAlphalistHighlight
.XX setCDKAlphalistHorizontalChar
.XX setCDKAlphalistLLChar
.XX setCDKAlphalistLRChar
.XX setCDKAlphalistPostProcess
.XX setCDKAlphalistPreProcess
.XX setCDKAlphalistULChar
.XX setCDKAlphalistURChar
.XX setCDKAlphalistVerticalChar
cdk_alphalist \- curses sorted list widget.
.SH SYNOPSIS
.LP
.B cc
.RI "[ " "flag" " \|.\|.\|. ] " "file" " \|.\|.\|."
.B \-lcdk
.RI "[ " "library" " \|.\|.\|. ]"
.LP
#include <cdk.h>
.nf
.TP 15
.B "char *activateCDKAlphalist ("
.BI "CDKALPHALIST *" "alphalist",
.BI "chtype *" "actions");
.TP 15
.B "void destroyCDKAlphalist ("
.BI "CDKALPHALIST *" "alphalist");
.TP 15
.B "void drawCDKAlphalist ("
.BI "CDKALPHALIST *" "alphalist",
.BI "boolean " "box");
.TP 15
.B "void eraseCDKAlphalist ("
.BI "CDKALPHALIST *" "alphalist");
.TP 15
.B "boolean getCDKAlphalistBox ("
.BI "CDKALPHALIST *" "alphalist");
.TP 15
.B "char **getCDKAlphalistContents ("
.BI "CDKALPHALIST *" "alphalist",
.BI "int *" "size");
.TP 15
.B "int getCDKAlphalistCurrentItem ("
.BI "CDKALPHALIST *" "widget");
.TP 15
.B "chtype getCDKAlphalistFillerChar ("
.BI "CDKALPHALIST *" "alphalist");
.TP 15
.B "chtype getCDKAlphalistHighlight ("
.BI "CDKALPHALIST *" "alphalist");
.TP 15
.B "char *injectCDKAlphalist ("
.BI "CDKALPHALIST *" "alphalist",
.BI "chtype " "input");
.TP 15
.B "void moveCDKAlphalist ("
.BI "CDKALPHALIST *" "alphalist",
.BI "int " "xpos",
.BI "int " "ypos",
.BI "boolean " "relative",
.BI "boolean " "refresh");
.TP 15
.B "CDKALPHALIST *newCDKAlphalist ("
.BI "CDKSCREEN *" "cdkscreen",
.BI "int " "xpos",
.BI "int " "ypos",
.BI "int " "height",
.BI "int " "width",
.BI "const char * " "title",
.BI "const char * " "label",
.BI "CDK_CONST char ** " "list",
.BI "int " "listSize",
.BI "chtype " "fillerCharacter",
.BI "chtype " "highlight",
.BI "boolean " "box",
.BI "boolean " "shadow");
.TP 15
.B "void positionCDKAlphalist ("
.BI "CDKALPHALIST *" "alphalist");
.TP 15
.B "void setCDKAlphalist ("
.BI "CDKALPHALIST *" "alphalist",
.BI "CDK_CONST char ** " "list",
.BI "int " "listSize",
.BI "chtype " "fillerCharacter",
.BI "chtype " "highlight",
.BI "boolean " "box");
.TP 15
.B "void setCDKAlphalistBackgroundAttrib ("
.BI "CDKALPHALIST *" "alphalist",
.BI "chtype " "attribute");
.TP 15
.B "void setCDKAlphalistBackgroundColor ("
.BI "CDKALPHALIST *" "alphalist",
.BI "const char * " "color");
.TP 15
.B "void setCDKAlphalistBox ("
.BI "CDKALPHALIST *" "alphalist",
.BI "boolean " "box");
.TP 15
.B "void setCDKAlphalistBoxAttribute ("
.BI "CDKALPHALIST *" "alphalist",
.BI "chtype " "character");
.TP 15
.B "void setCDKAlphalistContents ("
.BI "CDKALPHALIST *" "alphalist",
.BI "CDK_CONST char ** " "list",
.BI "int " "listSize");
.TP 15
.B "void setCDKAlphalistCurrentItem ("
.BI "CDKALPHALIST *" "widget",
.BI "int " "item");
.TP 15
.B "void setCDKAlphalistFillerChar ("
.BI "CDKALPHALIST *" "alphalist",
.BI "chtype " "fillerCharacter");
.TP 15
.B "void setCDKAlphalistHighlight ("
.BI "CDKALPHALIST *" "alphalist",
.BI "chtype " "highlight");
.TP 15
.B "void setCDKAlphalistHorizontalChar ("
.BI "CDKALPHALIST *" "alphalist",
.BI "chtype " "character");
.TP 15
.B "void setCDKAlphalistLLChar ("
.BI "CDKALPHALIST *" "alphalist",
.BI "chtype " "character");
.TP 15
.B "void setCDKAlphalistLRChar ("
.BI "CDKALPHALIST *" "alphalist",
.BI "chtype " "character");
.TP 15
.B "void setCDKAlphalistPostProcess ("
.BI "CDKALPHALIST *" "alphalist",
.BI "PROCESSFN " "callback",
.BI "void * " "data");
.TP 15
.B "void setCDKAlphalistPreProcess ("
.BI "CDKALPHALIST *" "alphalist",
.BI "PROCESSFN " "callback",
.BI "void * " "data");
.TP 15
.B "void setCDKAlphalistULChar ("
.BI "CDKALPHALIST *" "alphalist",
.BI "chtype " "character");
.TP 15
.B "void setCDKAlphalistURChar ("
.BI "CDKALPHALIST *" "alphalist",
.BI "chtype " "character");
.TP 15
.B "void setCDKAlphalistVerticalChar ("
.BI "CDKALPHALIST *" "alphalist",
.BI "chtype " "character");
.SH DESCRIPTION
The Cdk alphalist allows a user to select from a list of alphabetically
sorted words.
The user can use the arrow keys to traverse through the
list or type in the beginning of the word and the list will automatically
adjust itself in the correct place in the scrolling list.
This widget,
like the file selector widget, is a compound widget of both the entry
field widget and the scrolling list widget.
.SH AVAILABLE FUNCTIONS
.TP 5
.B activateCDKAlphalist
activates the alphalist widget and lets the user interact with the widget.
The parameter \fBalphalist\fR is a pointer to a non-NULL alphalist widget.
If the \fBactions\fR parameter is passed with a non-NULL value, the
characters in the array will be injected into the widget.
To activate the widget
interactively pass in a \fINULL\fR pointer for \fBactions\fR.
If the character entered
into this widget is \fIRETURN\fR then this function will return a \fIchar *\fR
of the information which was typed in the field.
If the \fITAB\fR character is hit
then the widget will try to complete the word in the entry field.
If the widget
is exited with the \fIRETURN\fR character then the widget data \fIexitType\fR
will be set to \fIvNORMAL\fR.
If the widget was exited with the \fIESCAPE\fR key
then the widget data \fIexitType\fR will be set to \fIvESCAPE_HIT\fR and
the widget returns \fINULL\fR.
.TP 5
.B destroyCDKAlphalist
removes the widget from the screen and frees memory the object used.
.TP 5
.B drawCDKAlphalist
draws the alphalist widget on the screen.
If the \fBbox\fR parameter is true, the widget is drawn with a box.
.TP 5
.B eraseCDKAlphalist
removes the widget from the screen.
This does \fINOT\fR destroy
the widget.
.TP 5
.B getCDKAlphalistBox
returns true if the widget will be drawn with a box around it.
.TP 5
.B getCDKAlphalistContents
returns the contents of the alphalist.
.TP 5
.B getCDKAlphalistCurrentItem
returns the current position in the scroll-widget.
.TP 5
.B getCDKAlphalistFillerChar
returns the character being used as the filler character in the
entry field portion of the widget.
.TP 5
.B getCDKAlphalistHighlight
returns the attribute of the highlight bar of the scrolling
list portion of the widget.
.TP 5
.B injectCDKAlphalist
injects a single character into the widget (actually the entry widget).
The parameter \fBalphalist\fR is a pointer to a non-NULL alphalist widget.
The parameter \fBcharacter\fR is the character to inject into the widget.
The return value and side-effect (setting the widget data \fIexitType\fP)
depend upon the injected character:
.RS
.TP
\fIRETURN\fP or \fITAB\fR
the function returns
the information in the entry field.
The widget data \fIexitType\fR is set to \fIvNORMAL\fR.
.TP
\fIESCAPE\fP
the function returns
a \fINULL\fR pointer.
The widget data \fIexitType\fR is set to \fIvESCAPE_HIT\fR.
.TP
Otherwise
unless modified by preprocessing, postprocessing or key bindings,
the function returns
a \fINULL\fR pointer.
The widget data \fIexitType\fR is set to \fIvEARLY_EXIT\fR.
.RE
.TP 5
.B moveCDKAlphalist
moves the given widget to the given position.
The parameters \fBxpos\fR and \fBypos\fR are the new position of the widget.
The parameter \fBxpos\fR may be an integer or one of the pre-defined values
\fITOP\fR, \fIBOTTOM\fR, and \fICENTER\fR.
The parameter \fBypos\fR may be an integer or one of the pre-defined values \fILEFT\fR,
\fIRIGHT\fR, and \fICENTER\fR.
The parameter \fBrelative\fR states whether
the \fBxpos\fR/\fBypos\fR pair is a relative move or an absolute move.
For example, if \fBxpos\fR = 1 and \fBypos\fR = 2 and \fBrelative\fR = \fBTRUE\fR,
then the widget would move one row down and two columns right.
If the value of \fBrelative\fR was \fBFALSE\fR then the widget would move to the position (1,2).
Do not use the values \fITOP\fR, \fIBOTTOM\fR, \fILEFT\fR,
\fIRIGHT\fR, or \fICENTER\fR when \fBrelative\fR = \fITRUE\fR.
(weird things may happen).
The final parameter \fBrefresh\fR is a boolean value
which states whether the widget will get refreshed after the move.
.TP 5
.B newCDKAlphalist
creates a pointer to an alphalist widget.
Parameters:
.RS
.TP 5
\fBscreen\fR
is the screen you wish this widget to be placed in.
.TP 5
\fBxpos\fR
controls the placement of the object along the horizontal axis.
This parameter
can take an integer or one of the pre-defined values \fILEFT\fR,
\fIRIGHT\fR, and \fICENTER\fR.
.TP 5
\fBypos\fR
controls the placement
of the object along the vertical axis.
This parameter may be an integer
value or one of the pre-defined values \fITOP\fR, \fIBOTTOM\fR, and \fICENTER\fR.
.TP 5
\fBheight\fR and
.TP 5
\fBwidth\fR
control the height and width of the widget.
If you provide a value of zero for either of the height
or the width, the widget will be created with the full width and height of the screen.
If you provide a negative value, the widget will be created the full height
or width minus the value provided.
.TP 5
\fBtitle\fR
is the string which will be displayed at the top of the scrolling list.
The title can be more than one
line; just provide a carriage return character at the line break.
.TP 5
\fBlabel\fR
is the string which will be displayed in the label of the entry field.
.TP 5
\fBlist\fR
is the list of words which will be displayed in the
scrolling list.
This list does not have to be sorted, this widget automatically
sorts the list
(note that it modifies the caller's copy of the list to do this).
.TP 5
\fBlistSize\fR
tells the widget how large the word list is.
.TP 5
\fBfillerCharacter\fR
is the character which is to be displayed in an empty space in the entry field.
.TP 5
\fBhighlight\fR
is the attribute of the highlight bar in the scrolling list.
.TP 5
\fBbox\fR
is true if the widget should be drawn with a box around it.
.TP 5
\fBshadow\fR
is true to turn the shadow on around this widget.
.RE
.IP
If the
widget could not be created then a \fINULL\fR pointer is returned.
.TP 5
.B positionCDKAlphalist
allows the user to move the widget around the screen via the cursor/keypad keys.
See \fBcdk_position (3)\fR for key bindings.
.TP 5
.B setCDKAlphalist
lets the programmer modify certain elements of an existing alphalist widget.
The parameter names correspond to the same parameter
names listed in the \fBnewCDKAlphalist\fR function.
.TP 5
.B setCDKAlphalistBackgroundAttrib
sets the background attribute of the widget.
The parameter \fBattribute\fR is a curses attribute, e.g., A_BOLD.
.TP 5
.B setCDKAlphalistBackgroundColor
sets the background color of the widget.
The parameter \fBcolor\fR
is in the format of the Cdk format strings.
See \fBcdk_display (3)\fR.
.TP 5
.B setCDKAlphalistBox
sets whether the widget will be drawn with a box around it.
.TP 5
.B setCDKAlphalistBoxAttribute
sets the attribute of the box.
.TP 5
.B setCDKAlphalistContents
sets the contents of the alphalist widget
(note that it sorts the caller's copy of the list).
.TP 5
.B setCDKAlphalistCurrentItem
set the current position in the scroll-widget.
.TP 5
.B setCDKAlphalistFillerChar
sets the character to use when drawing the entry field portion of the widget.
.TP 5
.B setCDKAlphalistHighlight
sets the attribute of the highlight bar of the scrolling
list portion of the widget.
.TP 5
.B setCDKAlphalistHorizontalChar
sets the horizontal drawing character for the box to
the given character.
.TP 5
.B setCDKAlphalistLLChar
sets the lower left hand corner of the widget's box to
the given character.
.TP 5
.B setCDKAlphalistLRChar
sets the lower right hand corner of the widget's box to
the given character.
.TP 5
.B setCDKAlphalistPostProcess
allows the user to have the widget call a function after the
key has been applied to the widget.
The parameter \fBfunction\fR is the callback function.
The parameter \fBdata\fR points to data passed to the callback function.
To learn more about post-processing see \fIcdk_process (3)\fR.
.TP 5
.B setCDKAlphalistPreProcess
allows the user to have the widget call a function after a key
is hit and before the key is applied to the widget.
The parameter \fBfunction\fR is the callback function.
The parameter \fBdata\fR points to data passed to the callback function.
To learn more about pre-processing see \fIcdk_process (3)\fR.
.TP 5
.B setCDKAlphalistULChar
sets the upper left hand corner of the widget's box to
the given character.
.TP 5
.B setCDKAlphalistURChar
sets the upper right hand corner of the widget's box to
the given character.
.TP 5
.B setCDKAlphalistVerticalChar
sets the vertical drawing character for the box to
the given character.
.SH KEY BINDINGS
When the widget is activated there are several default key bindings which will
help the user enter or manipulate the information quickly.
Since this widget is
built from both the scrolling list widget and the entry field widget, the key
bindings are the same for the respective fields.
The extra key bindings are
listed below.
.LP
.TS
center tab(/) allbox;
l l
l l
lw15 lw35 .
\fBKey/Action\fR
=
Up Arrow/T{
Scrolls the scrolling list up one line.
T}
Down Arrow/T{
Scrolls the scrolling list down one line.
T}
Page Up/T{
Scrolls the scrolling list up one page.
T}
CTRL-B/T{
Scrolls the scrolling list up one page.
Page Down/Scrolls the scrolling list down one page.
T}
CTRL-F/T{
Scrolls the scrolling list down one page.
T}
Tab/T{
Tries to complete the word in the entry field.
If the word segment is not unique then the
widget will beep and present a list of close matches.
T}
Return/T{
Returns the word in the entry field.
It also sets the widget data \fIexitType\fR to \fIvNORMAL\fR.
T}
Escape/T{
Exits the widget and returns a \fINULL\fR pointer.
It also sets the widget data \fIexitType\fR to \fIvESCAPE_HIT\fR.
T}
.TE
.SH SEE ALSO
.BR cdk (3),
.BR cdk_binding (3),
.BR cdk_display (3),
.BR cdk_position (3),
.BR cdk_screen (3)
.SH NOTES
.PP
This widget is created from the scrolling list widget and the entry field widget.
This is a good example on how to build your own widgets using the
base widgets provided in this distribution.
